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<pre><span class="comment"> /****************************************************************************
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 #include &lt;QtGui&gt;

 #include &quot;pieview.h&quot;
 #include &quot;mainwindow.h&quot;

 MainWindow::MainWindow()
 {
     QMenu *fileMenu = new QMenu(tr(&quot;&amp;File&quot;), this);
     QAction *openAction = fileMenu-&gt;addAction(tr(&quot;&amp;Open...&quot;));
     openAction-&gt;setShortcut(QKeySequence(tr(&quot;Ctrl+O&quot;)));
     QAction *saveAction = fileMenu-&gt;addAction(tr(&quot;&amp;Save As...&quot;));
     saveAction-&gt;setShortcut(QKeySequence(tr(&quot;Ctrl+S&quot;)));
     QAction *quitAction = fileMenu-&gt;addAction(tr(&quot;E&amp;xit&quot;));
     quitAction-&gt;setShortcut(QKeySequence(tr(&quot;Ctrl+Q&quot;)));

     setupModel();
     setupViews();

     connect(openAction, SIGNAL(triggered()), this, SLOT(openFile()));
     connect(saveAction, SIGNAL(triggered()), this, SLOT(saveFile()));
     connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));

     menuBar()-&gt;addMenu(fileMenu);
     statusBar();

     openFile(&quot;:/Charts/qtdata.cht&quot;);

     setWindowTitle(tr(&quot;Chart&quot;));
     resize(640, 480);
 }

 void MainWindow::setupModel()
 {
     model = new QStandardItemModel(8, 2, this);
     model-&gt;setHeaderData(0, Qt::Horizontal, tr(&quot;Label&quot;));
     model-&gt;setHeaderData(1, Qt::Horizontal, tr(&quot;Quantity&quot;));
 }

 void MainWindow::setupViews()
 {
     QSplitter *splitter = new QSplitter;
     QTableView *table = new QTableView;
     pieChart = new PieView;
     splitter-&gt;addWidget(table);
     splitter-&gt;addWidget(pieChart);
     splitter-&gt;setStretchFactor(0, 0);
     splitter-&gt;setStretchFactor(1, 1);

     table-&gt;setModel(model);
     pieChart-&gt;setModel(model);

     QItemSelectionModel *selectionModel = new QItemSelectionModel(model);
     table-&gt;setSelectionModel(selectionModel);
     pieChart-&gt;setSelectionModel(selectionModel);

     setCentralWidget(splitter);
 }

 void MainWindow::openFile(const QString &amp;path)
 {
     QString fileName;
     if (path.isNull())
         fileName = QFileDialog::getOpenFileName(this, tr(&quot;Choose a data file&quot;),
                                                 &quot;&quot;, &quot;*.cht&quot;);
     else
         fileName = path;

     if (!fileName.isEmpty()) {
         QFile file(fileName);

         if (file.open(QFile::ReadOnly | QFile::Text)) {
             QTextStream stream(&amp;file);
             QString line;

             model-&gt;removeRows(0, model-&gt;rowCount(QModelIndex()), QModelIndex());

             int row = 0;
             do {
                 line = stream.readLine();
                 if (!line.isEmpty()) {

                     model-&gt;insertRows(row, 1, QModelIndex());

                     QStringList pieces = line.split(&quot;,&quot;, QString::SkipEmptyParts);
                     model-&gt;setData(model-&gt;index(row, 0, QModelIndex()),
                                    pieces.value(0));
                     model-&gt;setData(model-&gt;index(row, 1, QModelIndex()),
                                    pieces.value(1));
                     model-&gt;setData(model-&gt;index(row, 0, QModelIndex()),
                                    QColor(pieces.value(2)), Qt::DecorationRole);
                     row++;
                 }
             } while (!line.isEmpty());

             file.close();
             statusBar()-&gt;showMessage(tr(&quot;Loaded %1&quot;).arg(fileName), 2000);
         }
     }
 }

 void MainWindow::saveFile()
 {
     QString fileName = QFileDialog::getSaveFileName(this,
         tr(&quot;Save file as&quot;), &quot;&quot;, &quot;*.cht&quot;);

     if (!fileName.isEmpty()) {
         QFile file(fileName);
         QTextStream stream(&amp;file);

         if (file.open(QFile::WriteOnly | QFile::Text)) {
             for (int row = 0; row &lt; model-&gt;rowCount(QModelIndex()); ++row) {

                 QStringList pieces;

                 pieces.append(model-&gt;data(model-&gt;index(row, 0, QModelIndex()),
                                           Qt::DisplayRole).toString());
                 pieces.append(model-&gt;data(model-&gt;index(row, 1, QModelIndex()),
                                           Qt::DisplayRole).toString());
                 pieces.append(model-&gt;data(model-&gt;index(row, 0, QModelIndex()),
                                           Qt::DecorationRole).toString());

                 stream &lt;&lt; pieces.join(&quot;,&quot;) &lt;&lt; &quot;\n&quot;;
             }
         }

         file.close();
         statusBar()-&gt;showMessage(tr(&quot;Saved %1&quot;).arg(fileName), 2000);
     }
 }</pre>
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